Adjustable rubbing plate



y March 21, 1928.

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H. E. CAMPBELL ADJUSTABLE RUBBING PLATE Flled Aug. 26, 1925 Patented Mar. 27, y1928..

untreu srarss HARRY E. CAMPBELL, OF BALTIMORE, MARYLAND, ASSIGNOR TO CAMPBELL METAL WINDOW CORPORATION, OF BALTIMORE, MARYLAND, A CORPORATION 0F MARY- LAND.

ADJUSTABLE RUBBING PLATE.

Application vfiled. August 26, 1925. Serial No. 52,501.

My present invention relates to rubbing plates which are used at the ends of meeting rails in windows of the type in which each sash has a projecting plate which extends into an opening formed in the jamb.

I have found that when the windowframes are set in place, the jambs may be slightly bowed inward, and therefore the clearance between the ends of the meeting` rails and the center of the jamb face may be quite diierent after the frame is installed as compared to what it was when the window left the factory. This means either. that rubbing plates of various sizes must be provided, or the rubbing plates must be tiled down exactly to lill the space between the ends of the meeting rails and the center of the jamb face.

My present invention relates to a rubbing plate of adjustable thickness. In the accompanying drawings which show an illustrative example of my invention, Fig. 1 is a sectional view through the meeting rails looking at the center of a jamb face showing an adjustable rubbing block in place;- Fig. 2 is a similar view without showing the sash meeting rails; Fig. 3 is a section on line 3-3 of Fig. 2, but showing the ,lower vsash slightly raised, and Fig. 4 is a section online 4- 4 of Fig. 2.

In windows of the type referred to, there are provided two slots 10 and 11, between which in this instance there is a T-shaped parting'strip 12. At its `vertical center the parting strip 12 is provided with two notches 13. The rubbing plate proper is designated by the numeral 14 and is in the form of a U-shaped channel with its ends bent toward the channel opening. This member is preferably made as a stamping, and if desired may be made of brass. In the drawing, the sides of the channel are designated -by the numeral 15 and the bent ends by the numeral 16. The rubbing plate 14 has an overall width exactly equal to the width of the parting strip 12 and its length is the same as the len h of the notches 13, so that the sides 15 can enter these notches. through the rubbing plate 14 into the parting strip 12. In order to hold the rubbing plate 14 out against the heads of the screws 17, and

Y in order to eliminate any possibility of air passing'between the rubbing plate 14 and the parting strip 12, a Hat piece of spring Screws 17 pass metal 18 is interposed between the parting strip 12 and the rubbing plate 14. This spring metal is cut of a width so it will just .it between the sides 15, and its length is slightly less than the length of the plate 14. It is to be noted that the screws 17 are countersunk into the plate 14 and thatI the spring plate 18 has slightly elongated openings 19 through whichthese lscrews pass.

.- It is not my intention that this plate shall function in any way as a spring closing device for the window; in fact, this would not be possible with the arrangement. shown, as the screws 17 determine both the minimum as well as the maximum effective thickness of the plate. However, -with this arrangement, it is possible to form the windows wlth a substantial clearance between the ends of the meeting rails and the face of parting strip l2 and have the opening thus formed entirely lilled when the window is shut; for example, in Fig. 3 it is clear that during most of the movement of the lower sash, there is a substantial clearance between its meeting rail 20 and the parting strip 12.l

After the windows are installed, ythe screws 17 are taken up to the point where the meeting rails will make a snug it against the face of rubbing plate 14, but will operate without further compressing sprin 18. It is intended that therubbing plate s all then remain stationaryl unless settling of the building or similar cause shall make n ew adjustment necessary. Repeated painting ofthe window' will only serve to seal any possibility of air leaks back of the r'ubbing plate, and will not interfere with its operation, since it is not intended to move. It is to be understood that the foregoing example is given by way of illustration only, and may be modified in many particulars without departing from the spirit of myl invention. What I claim is: A window-frame and sash construction comprising on each side a partlng str1p having'a substantially continuous face near the centre of the window, sashes having meeting rails of such length as to leave substantial clearances between the ends thereofand said parting strips, a rubbing plate carried by each ofsaid parting strips in such position a's ing rails when the wmdow 1s closed, and

to be opposite the ends of the meethaving its rear face spadout'from said parting strip and having sides adapted to Y embrace the sides of the parting strip, a compressible member interposed between the 5 face of each parting strip and one of said plates and substantially in contact with said sides, and means for regulating ,the position of of said plates relative to the strips, whereby the position of sai plates is made adjustable without permitting any lo substantial amount of air to pass between sald plates and the face of the parting strip.

,AHABYECAMPBELL' 

